免费在线阅读挑战计算器，精准测算阅读速度和时间，智能设定阅读目标并提供个性化书籍推荐。支持各类阅读挑战和自定义阅读计划，助您养成良好阅读习惯。
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"hotValue": 0,
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"americaHotValueDouble": 0,
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"selectedValueDouble": 791,
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免费在线有声书速度计算器，快速计算不同播放速度下的听书时间和节省时间。帮助您合理规划听书进度，优化有声书学习效率，提升听书体验。支持API接口调用。
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"americaHotValue": 0,
"selectedValueDouble": 791,
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"selectedValue": 791,
"chinaHotValue": 0,
"hotValueDouble": 0
}
